Paper-bag machine



(No Model.) 9 Sheets-Sheet 1. C. B. STILWELL.

PAPER BAG MACHINE.

No. 511,171. Patented Dec. 19, 1893.

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WITNESSES:

(No Model.) 9 Sheets-Sheet 2.

0. B. STILWELL. PAPER BAG MACHINE.

No. 511,171. Patented Dec. 19, 1893.

WlTNESSES: INVENTOR:

(No Model.) 9 Sheets-Sheet 3. 0. B. STILWELL. PAPER BAG MACHINE.

(No Model.) 9 Sheets-Sheet 4. C. B. STILWELL. PAPERBAG MACHINE.

No. 511,171. Patented Dec. 19, 1893 I I l 1 I WITNESSES: I m, f M4 6 L LIIHO I NG c0 F I N VON D o AWORNEY.

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(No Model.)

No. 511,171. Patented 1m. 19, 1119's;

INVENTOR BY ATTORNEY THE NA'WL LH'HO RAPKING COMPANY wuumurun. o. c.

CQZMWz WITNESSES (No Model.) 9 Sheets-Sheet 8. O. B. STILWELL.

PAPER BAG MACHINE.

No. 511,171. Patented Dec. 19,1893.

INVENTOR:

EY v LN. 3 m w THE NAYNJNAL LITHOQWI-GNG COMPANY.

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WITNESSES:

(E0 Model.) 9 Sheets-Bheet 9. G. B. STILWELL. PAPER BAG MAGHINE.

No. 511,171; Patented Dec. 19, 1893.

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UNITED STATES PATENT Enron.

CHARLES E. STILW'ELL, OF \YAYNE, ASSIGNOR TO THE UNION PAPER BAG MACHINE COMPANY, OF PHILADELPHIA, PENNSYLVANIA.

PAPER-BAG MACH [N E.

SPECIFICATION forming part of Letters Patent No. 511,171, dated December 19, 1893.

Application filed June 4, 1891. Serial No. 395K114. (No model.)

To all whom it may concern.-

Be it known that I, CHARLES E. STILWELL, of Wayne, countyof Delaware, State of Pennsylvania, have invented a certain new and useful Paper-Bag Machine, of which the following is a true and exact description, reference being had to the accompanying drawings, which form a part of this specification.

My invention relates to mechanism for foldro ing over the ends of what is called the diamond in satchel-bottom and square satchelbottorn bags.

As shown in the drawings the mechanism is especially design ed and adapted for use in connection with the mechanism for forming the diamond on the end of a bellows-folded tube which is shown and described in the Lottors Patent granted to me December 17, 1889, No. 4173346.

The particularobjects whichI have in view are the rapid and perfect formation of the final folds of the bag, the provision of readily adjustable mechanism adapted for different sizes of bags, and the organization of the 2 5 mechanism intocompact form.

The nature of my improvements will be best understood as described in connection with the drawingsin which they are illustrated and in which Figure 1 is an elevation showing the general organization and arrangement of the mechanism to which my invention relates. Fig. 2 is a central vertical section through such mechanism; Fig. 32. similar mechanism 3 5 showing the parts in a dilferent relation with each other; Fig. at a view of a portion of the mechanism connected with the shaft 2; Fig. 5

an end view of the mechanism shown in Fig.

4 viewed from the right; Fig. 6 an elevation 0 of a part ,of the mechanism connected with shaft 2. Fig. 7 is an elevation of the cylinder 0; Fig. 8 an end view of said cylinder. Fig. 9is an elevation showing the shaft Eand parts attached to it; Fig. 10 an end elevation .5 of shaft E and parts shown as attached to it in Fig. 9; Fig. 11 a view illustrating a detail I of construction; Fig. 12 a plan view of that part of the mechanism which completes the folding down of the two ends of the diamonds; Figs. 13 and 14 end and side elevations showing a device used in connection with the shaft 4. Fig. 15 is a cross-sectional view on the line a: a: of Fig. 7; Fig. 16 a detail view illustrating parts of the mechanism not clearly shown in the other figures. Figs. 17' to 24 inclusive all representin elevation the same parts of the mechanism illustrating different positions occupied by said parts in completing the folds of the bag. Fig. 25 is a detailed elevation illustrating another part of the mechanism not clearly shown in the other views, and Figs. and 27 are perspective views of detached details of the machine.

A indicates the frame-Work supporting the operating mechanism; B and B feed rolls which deliver the blank from the mechanism described in my former patent to the mechanism forming the final folds of the diamond. The roller B is secured to pivoted arms 13 and is held against the roller B by a spring B C and C are two segmental cylinders journaled respectively on the shafts 1 and 2; each cylinder is provided with a gear wheel asindicated at C Fig. 7 and by the lines C and O in the other figures; these gears are of similar diameter and are engaged so that the rotation of the one cylinder always effects a similar movement in the other cylinder.

0? is a spider fastened to the shaft 1 and supporting the two plates C and O placed side by sideso as to leave a space or groove between them. In this groove is situated a plate L the edge of which is held flush or nearly so with the mouth of the groove by means ofsprings I. (See Fig.26.) 'lhegroove between the plates C and G constitues a part of a creasing device the creasing of a piece of paper taking place by the action of a plate pushing the paper before it into the groove; and the spring-supported plate, or plunger as I shall call it, L, is used for the purpose of pushing the paper out of the groove after the creasing plate is withdrawn, the said plunger yielding to the pressure of the plate but resuming its former position when the plate is removed.

Before going fu ther with the description I will here note the fact that the creasing devices are shown throughout in duplicate; that is to say, two sets of creasing devices are too shown as connected with the shafts l and 2.

It will, however, be understood as myinvention has no particular reference to the use of two separate creases and that mechanism in which only a single set is attached to theshaft or in which more than two sets are used as' equally within the scope of my invention.

The spider O is secured to the shaft 1 inside of the segmental cylinder 0 and the creasing plates connected with it extend out through spaces in which the periphery or pressing surfaces of the cylinder is cut away.

C and O are parallel creasing blades secured to the cylinder 0 in the same way that the plates C and O are secured to the spider. The shaft 1 is geared to the shaft 2 so as to rotate with exactly the same speed and in an opposite direction and the segmental cylinder 0 is loosely journaled on the shaft 1.

Upon the shaft 2 is secured by means of screws 0 a spider O carrying creasing blades 0 and C which enter the slots between the plates C and C on the spider C The spider C is inside of the cylinder 0.

which is journaled on the shaft 2 and the pressing surfaces or periphery of which is intermediate as shown where the creasing blades 0 and O extend through it. Connected with the cylinder 0 are creasing blades E arranged to enter between the creasing blades 0 and 0 connected with the cylinder 0. As the two cylinders are geared together it will be seen that their respective creasing devices will always come to proper position irrespective of the position of the cylinders with respect to the spiders; and the adjustment for different sizes of bags is made by turning the cylinder 0 to a position with respect to the spider which will bring the creasing blades E to a proper distance from the creasing blades 0 and 0 This effects a similar arrangement of the creasing blades attached to the spider (3 and cylinder 0 and the adjustment having been made the cylinder 0 is secured to the shaft 2 so as to rotate with it. In the drawings this is accomplished by means of a bolt 0 (shown in Figs. 2 and 3) screwing into the spider C and through a slot 0 in the side of cylinder 0 (as shown in Fig. 8) the slot being suificiently long to enable any desired adjustment to be made.

E E are shafts extending through the cylinderO and journaled at the sides thereof so as to turn with the cylinder. At the end of the shaft E is secured a lever or crank arm E (see Figs.4, 5 and 6) having a cam roller 6 extending out from its end; this cam roller is acted upon by a cam G of which 9 is the acting face, said cam being secured by a clamp G to the stationary journal box F on shaft 2; this cam acting through the cam roller c gives an oscillating movement to the shaft E as it rotates with the casing O; a spring I (see Figs. 7 and 7) coming in opposition to the cam and tending to hold the shaft E in the normal position indicated at the left of Fig. 2 in which it will be seen that a stop E attached to shaft E rests against a stop or projection (3 on cylinderO. Attached to the shaft E is a creasing blade E and folder E and the action of the cam is first to bring the blade E into proper position to enter between the plates 0 and G as shown in Fig. 2 and then to permit the folder E to move rapidly forward to the position shown at the right hand of Fig. 3, the blade E moving in at the same time. Attached to the stop E is a spring 6 the ends of which extend through slots formed in the blade E; when the blade is operating, the springs are forced inward as shown in Fig. 2 and the action of the spring is to force the paper away from the blade after the crease has been formed.

The bag blank is indicated at R, the crease formed by the blade 0 in connection with plates C and O at S, the front flap of the creased diamond being indicated by U, the rear crease sormed by the blade E in conjunction with the plates 0 O is indicated at T and the rear [lap of the creased diamond at V. The function of the folder E is to throw or to push the rear flap of the creased diamond forward as indicated in" Fig. 3 and I .will here note that D D indicate guides which hold the blank close to the periphery of the roller G; and M is a roller between which and the folder E the crease or fold T is pressed just before the blank passes away from the creasin g cylinder O.

I will here note that the operation of the folders E even apart from their conjoint action with the blades E is a novel and important feature of my invention the said device being adapted for use Where the preliminary creasing of the blank is performed by other instrumentalities.

0 indicate light springs secured to the spider and having their free ends projected so as to lie in the path of the folder E in the face of which grooves 6 (see Fig. 9) are formed to receive the ends of the springs. These springs serve to guide the blank, the rear flap of which is folded down between but not over the spring ends. (See Fig. 27.) l

I find it desirable to provide an instrumentality which will act to throw the flap V forward in advance of the action of the folder E and for this purpose I use the rod J which is secured to an arm J journaled on shaft E by a set-screw j and which has a projecting endj to which is attached a spring J- connected also with the shaft E in such a way as to hold the rod J normally in the position indicated in Figs. 5 and 6. From the arm J extends finger 7' and attached to cam G by an arm K is a cam K which engages said finger just before the corresponding blade E is brought to operative position and pulls back the arms J or rather holds it back until after the paper is creased; then releasing it and permitting the rod J to fly quickly forward engaging the flap V and folding it forward in advance of the action of the folder E which, moving forward more slowly, comes over the fold formed by the action of rod J.

The creased and partly folded diamond after IIO passing over the roller M is fed over the fin ger N to the mechanism on and under shaft e the finger N having an intermittent up and down motion the functionof whichis to present the flap U properly to the action of the following mechanism. The finger N is formed of the end of a shaft .N'journaled on an arm N extending out from the frame; and the shaft N is provided with another arm or finger N which normally rests against an annular projection N of a wheel N but is struck and depressed once in each revolution of the cam by a. pin N thus throwing the finger N up to a position such for instance as is shown in Fig. 18.

O and O are drums from which runs an apron O and O is a presser roll resting on the apron immediately above the drum Situated above the apron is a shaft at to which is attached a plate P and fingers P P the plate and fingers being set at an angle to each as indicated in the drawings and the fingers being adjustable on the shaft to change its angle. The shaft 4 is given a rotary movement of varying speed by means of a device kn own as the lVitworth motion, a slotted'gnide plate, P being secured to one end of the shaft in which moves a pin P attached to the rim of a wheel P the axis of which is parallel but eccentric to that of the shaft 4. Journaled on the shaft 4 is a sleeve P from which extends a bent arm P having at its end a slotted I 24) it will be noticed that Fig. 17 shows the various parts in the same position as they are shown in Fig. 3. Fig. 18 shows the next position. and it will be noticed that the arm N is thrown up so as to prevent the flap ll of the bag blank from passing beneath the plate P. As soon as this danger is over the finger N falls again permitting the flap U to enter between the plate P and the fingers P as shown in Fig. 19. In Fig. 20 is shown the next position of the parts and it will be noticed that the flap V rests between the fingers P and the wire rod P In Figs. 21 and 22 the operation of the plate P in folding back the front flap and the wire]? in folding forward the back fiap is illustrated, and in Fig. 2 this action is still further carried on showing how the folded edge S is presented to the pressing rolls 0' and O Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is-- 1. In combination with a creasing blade, one or more springs e the ends of which extend through slots 8 in the edge of the blade and which actto push the paper away from the blade, substantially as and for the'purpose specified.

The combination of the shaft 1; aspider C secured to said shaft and supporting one or more pairs of creasing plates 0 G a segmental cylinderC journaled on said shaft and carrying one or more pairs of creasing plates scribed the combination of the segmental cylinder 0 one or more shafts E journaled in the sides of said cylinder; a crank arm E on said shaft; a stationary cam G arranged to operate on said crank-arm as described while the cylinder revolves; a spring I arranged to act on shaft E holding it normally against a stop 0 a folder E attached to shaft E and which is actuated by cam G, and suitable creasing and holding devices substantially as and for the purpose specified.

4. In a bag machine substantially as described the combination of the segmental cylinder C one or more shafts E journaled in the sides of said cylinder; a crank-arm E on said shaft; a stationary cam G arranged to operate on said crank-arm as described while the cylinder revolves; a spring I arranged to act on shaft E holding it normally against a stop 0 a creasing blade E attached to shaft E and which is thrown into operative position by the cam 5 a folder E also attached to shaft E and which is arranged to act after the creasing and suitable creasing and holding devices substantially as and for the purpose specified.

5. In a bag machine substantially as described, the combination of the segmental cylinder 0, one or more shafts E journaled in the sides of said cylinder; acrank-arm E on said shaft; a stationary cam G arranged to operate on said crank arm as described while the cylinder revolves; a spring I arranged to act on shaft E holding it normally against a stop 0 a creasing blade E attached to shaft E and which is thrown into operative position by the cam; a folder E also attached to shaft E and which is arranged to act after the creasing; a supplemental folder-rod J; an arm J supporting rod J, said arm being journaled on shaft E; a spring J acting to hold rod J normally between blade E and folder E a cam K arranged to catch and hold rod J while blade E is actingand to release it in advance of the-action of folder E and suitable creasing and holding devices.

(5. The combination of an apron as 0 ,.1 shaft i journaled above said apron and rotating with varying speed; a plate P secured to said shaft; fingers Palso secured to said shaft and set at an angle with plate P as described; a sleeve 1P journaled on shaft at and rotating at varying speed and for a time at greater speed than shaft 4; and an arm P secured to sleeve P and extending across the apron behind fingers P.

7. The combination of an apron as 0 ashaft 4 journaled above said apron, a guide-bar P secured to the end of shaft 4; a Wheel P journaled eccentrically to shaft 4 and engaged in 

